that's why there's a huge red ribbon on the white >> catherine: president obama is marking the occasion by announcing a new project to advance hiv research -- aimed at a cure. >> catherine: the president says the world has come a long way since 1988. this is an aids treatment center in china. a new study suggests that if fighting aids >> catherine: continues -- the world will reach "the beginning of the end of aids" as soon as 20-15. several 49ers swapped their helmets for santa hats this afternoon in san jose. >> jacqueline: , the 5:00 hour early to buy many brief showers are possible. breezy and clean in afternoon about 10 to 15 degrees cooler than today. very cool morning as a star with the bay area 20's and 30's bay area wide and deftly will see frost. as we look at the north a little bit to the east we're seeing the system slowly moving to the celt moving through overnight and dropped very cold air in its wake. we will see if the us now and the higher terrain with the system. at midnight tonight locally trained and snow in the sierra. with the front moving through at by persons cau